August 2015
Intermediate to advanced
312 pages
7h 28m
Japanese
Content preview from 初めてのSpark
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
92
5 章 データのロードとセーブ
5-31
Scala
HiveContext
ー
import org.apache.spark.sql.hive.HiveContext
val hiveCtx = new HiveContext(sc)
val rows = hiveCtx.sql("SELECT name, age FROM users")
val firstRow = rows.first()
println(firstRow.getString(0)) //
フィールド
0
は名前
5-32
Java
HiveContext
ー
import org.apache.spark.sql.hive.HiveContext;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SchemaRDD;
HiveContext hiveCtx = new HiveContext(sc);
SchemaRDD rows = hiveCtx.sql("SELECT name, age FROM users");
Row firstRow = rows.first();
System.out.println(firstRow.getString(0)); //
フィールド
0
は名前
Hive
からのデータのロードについては、「
9.3.1 Apache Hive
」で詳しく取り上げます。
5.4.2
JSON ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.